International Union of Pure and Applied Chemistry
Organic Chemistry Division
Commission on Nomenclature of Organic Chemistry

TREATMENT OF VARIABLE VALENCE IN ORGANIC NOMENCLATURE
( CONVENTION)

Recommendations 1983

Prepared for publication by W. H. Powell and published in Pure Appl. Chem., 1984, 56, 769-778.

https://www.qmul.ac.uk/sbcs/iupac/hetero/noGreek/Lm.html

World Wide Web version Prepared by G. P. Moss

School of Biological and Chemical Sciences, Queen Mary and Westfield College,
Mile End Road, London, E1 4NS, UK
G.P.Moss@QMW.AC.UK

These Rules are as close as possible to the published version [see W. H. Powell Pure Appl. Chem., 1984, 56, 769-778. Copyright IUPAC; reproduced with the permission of IUPAC]. If you need to cite these rules please quote this reference as their source.

For problems in converting the text into a World Wide Web version see the IUPAC home page.

Any comments, corrections or suggestions for a future edition should be e-mailed to G.P.Moss@QMW.AC.UK

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CONTENTS

INTRODUCTION

Preamble
Introduction
Discussion
References for this section
RECOMMENDATIONS
Lm-1.0. Terminology
Lm-1.1. Bonding Number
Lm-1.2. Standard Bonding Number
Lm-2.0. Designation of Nonstandard Bonding Numbers
Lm-3.0. Indicated Hydrogen
Lm-3.1. Maximum Number of Noncumulative Double Bonds
Lm-3.2. Indicated Hydrogen Symbolism
Lm-4.0. Derivatives of Parent hydrides
Lm-4.1. Saturation of Double Bonds
Lm-4.2. Multiple Bonds with a Saturated Parent Hydride
Lm-4.3. Derivatives
Lm-4.4. Prefixes
REFERENCES

Continued with Lambda Convention Introduction

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